<template>
  <div class="player" v-show="playlist.length>0">
    <transition name="normal"
                 @enter="enter"
                 @after-enter="afterEnter"
                @leave="leave"
                @after-leave="afterLeave"
    >
    <div class="normal-player" v-show="fullScreen">
      <div class="background">
        <img width="100%" height="100%" :src="currentSong.image">
      </div>
      <div class="top">
        <div class="back" @click="back">
          <i class="icon-back"></i>
        </div>
        <h1 class="title" v-html="currentSong.name"></h1>
        <h2 class="subtitle" v-html="currentSong.singer"></h2>
      </div>
      <div class="middle"
           @touchstart.prevent="middleTouchStart"
           @touchmove.prevent="middleTouchMove"
           @touchend="middleTouchEnd"
      >
        <div class="middle-l" ref="middleL">
          <div class="cd-wrapper" ref="cdWrapper">
            <div class="cd" :class="cdCls">
              <img class="image" :src="currentSong.image">
            </div>
          </div>
          <div class="playing-lyric-wrapper">
            <div class="playing-lyric">{{playingLyric}}</div>
          </div>
        </div>
        <scroll class="middle-r" ref="lyricList" :data="currentLyric&&currentLyric.lines">
          <div class="lyric-wrapper">
            <div v-if="currentLyric">
              <p ref="lyricLine"
                 class="text"
                 :class="{'current':currentLineNum===index}"
                 v-for="(line,index) in currentLyric.lines">{{line.txt}}</p>
            </div>
          </div>
        </scroll>6
      </div>
      <div class="bottom">
        <div class="dot-wrapper">
           <span class="dot" :class="{'active':currentShow==='cd'}"></span>
           <span class="dot" :class="{'active':currentShow==='lyric'}"></span>
        </div>
        <div class="progress-wrapper">
          <span class="time time-l">{{format(currentTime)}}</span>
          <div class="progress-bar-wrapper">
            <progress-bar @percentChange="onProgressBarChange" :percent="percent"></progress-bar>
          </div>
          <span class="time time-r">{{format(currentSong.duration)}}</span>
        </div>
         <div class="operators">
           <div class="icon i-left" @click="changeMode">
              <i :class="iconMode"></i>
           </div>
           <div class="icon i-left" :class="disableCls">
             <i @click="prev" class="icon-prev"></i>
           </div>
           <div class="icon i-center" :class="disableCls">
             <i :class="playIcon" @click="togglePlaying"></i>
           </div>
           <div class="icon i-right" :class="disableCls">
             <i @click="next" class="icon-next"></i>
           </div>
           <div class="icon i-right">
             <i class="icon icon-not-favorite"></i>
               <!--<i @click="toggleFavorite(currentSong)" class="icon" :class="getFavoriteIcon(currentSong)"></i>-->
           </div>
         </div>
      </div>
    </div>
    </transition>

    <transition name="mini">
    <div class="mini-player" v-show="!fullScreen" @click="open">
      <div class="icon">
        <img :class="cdCls" width="40" height="40" :src="currentSong.image">
      </div>
      <div class="text">
           <h2 class="name" v-html="currentSong.name"></h2>
           <p class="desc" v-html="currentSong.singer"></p>
      </div>
      <div class="control">
        <progress-circle :radius="radius" :percent="percent">
        <i @click.stop="togglePlaying" class="icon-mini" :class='miniIcon'></i>
        </progress-circle>
      </div>
      <div class="control" >
        <i class="icon-playlist"></i>
      </div>
    </div>
    </transition>
    <audio ref="audio" :src="currentSong.url" @canplay="ready" @error="error"
    @timeupdate="updateTime" @ended="end"></audio>
  </div>
</template>
<script type="text/ecmascript-6">
import {mapGetters,mapMutations, mapActions} from 'vuex'
import animations from 'create-keyframe-animation'
import {prefixStyle} from 'common/js/dom'
import ProgressBar from 'base/progress-bar/progress-bar'
import ProgressCircle from 'base/progress-circle/progress-circle'
import {playMode} from 'common/js/config'
import {shuffle} from 'common/js/util'
import Lyric from 'lyric-parser'
import Scroll from 'base/scroll/scroll'


const transfrom=prefixStyle('transform')
const transitionDuration=prefixStyle('transitionDuration')

  export default {
  data(){
    return{
      songReady:false,
      currentTime:0,
      radius:32,
      currentLyric:null,
      currentLineNum:0,
      currentShow:'cd',
      playingLyric:''
    }
  },
  computed:{
    cdCls(){
      return this.playing?'play':'play pause'
    },
    playIcon(){
      return this.playing?'icon-pause':'icon-play'
    },
    miniIcon(){
      return this.playing?'icon-pause-mini':'icon-play-mini'
    },
    disableCls(){
      return this.songReady?'':'disable'
    },
    percent(){
      return this.currentTime/this.currentSong.duration
    },
    iconMode(){
      return this.mode===playMode.sequence?'icon-sequence':this.mode===playMode.loop?'icon-loop':'icon-random'
    },
    ...mapGetters([
      'fullScreen',
      'playlist',
      'currentSong',
      'playing',
      'currentIndex',
       'mode',
      'sequenceList'
    ])
  },
    created(){
      this.touch={}
    },
    methods:{
    back(){
      this.setFullScreen(false)
    },
      open(){
        this.setFullScreen(true)
      },
      enter(el,done){
         const {x,y,scale}=this._getPosAndScale()

        let animation={
           0:{
             transform:`translate3d(${x}px,${y}px,0) scale(${scale})`
           },
           60:{
             transform:`translate3d(0,0,0) scale(1.1)`
           },
          100:{
             transform:`translate3d(0,0,0) scale(1)`
          }
        }
        animations.registerAnimation({
          name:'move',
          animation,
          presets:{
            duration:400,
            easing:'linear'
          }
        })
        animations.runAnimation(this.$refs.cdWrapper,'move',done)
      },
      afterEnter(){
          animations.unregisterAnimation('move')
        this.$refs.cdWrapper.style.animation=''
      },
      leave(el,done){
         this.$refs.cdWrapper.style.transition='all 0.4s'
         const {x,y,scale}=this._getPosAndScale()
        this.$refs.cdWrapper.style[transfrom]=`translate3d(${x}px,${y}px,0) scale(${scale})`
        this.$refs.cdWrapper.addEventListener('transitionend',done)
      },
      afterLeave(){
        this.$refs.cdWrapper.style.transition=''
        this.$refs.cdWrapper.style[transfrom]=''
      },
      togglePlaying(){
        if(!this.songReady){
          return
        }
        this.setPlayingState(!this.playing)
        if(this.currentLyric){
          this.currentLyric.togglePlay()
        }
      },
      end(){
        if(this.mode===playMode.loop){
          this.loop()
        }else {
          this.next()
        }
      },
      loop(){
        this.$refs.audio.currentTime=0
        this.$refs.audio.play()
        if(this.currentLyric){
          this.currentLyric.seek(0)
        }
      },
      next(){
        if(!this.songReady){
          return
        }
        if(this.playlist.length===1){
          this.loop()
        }else {
          let index = this.currentIndex + 1
          if (index === this.playlist.length) {
            index = 0
          }
          this.setCurrentIndex(index)
          if (!this.playing) {
            this.togglePlaying()
          }
        }
        this.songReady=false
      },
      prev(){
        if(!this.songReady){
          return
        }
        if(this.playlist.length===1) {
          this.loop()
        }else {
          let index = this.currentIndex - 1
          if (index === -1) {
            index = this.playlist.length - 1
          }
          this.setCurrentIndex(index)
          if (!this.playing) {
            this.togglePlaying()
          }
        }
        this.songReady=false
      },
      ready(){
        this.songReady=true
      },
      error(){
        this.songReady=true
      },
      updateTime(e){
         this.currentTime=e.target.currentTime
      },
      format(interval){
        interval=interval|0
        const minute=interval/60|0
        const second=this._pad(interval%60)
        return `${minute}:${second}`
      },
      getLyric(){
        this.currentSong.getLyric().then((lyric)=>{
          this.currentLyric=new Lyric(lyric,this.handleLyric)
          if(this.playing){
            this.currentLyric.play()
          }
        }).catch(()=>{
          this.currentLyric=null
          this.playingLyric=''
          this.currentLineNum=0
        })
      },
      handleLyric({lineNum,txt}){
         this.currentLineNum=lineNum
         if(lineNum>5){
           let lineEl=this.$refs.lyricLine[lineNum-5]
           this.$refs.lyricList.scrollToElement(lineEl,1000)

         }else{
           this.$refs.lyricList.scrollTo(0,0,1000)
         }
         this.playingLyric=txt
      },
      middleTouchStart(e){
        this.touch.initiated=true
        this.touch.moved = false
        const touch=e.touches[0]
        this.touch.startX=touch.pageX
        this.touch.startY=touch.pageY
      },
      middleTouchMove(e){
        if(!this.touch.initiated){
          return
        }
        const touch=e.touches[0]
        const deltaX=touch.pageX-this.touch.startX
        const deltaY=touch.pageY-this.touch.startY
        if(Math.abs(deltaY)>Math.abs(deltaX)){
            return
        }
        if (!this.touch.moved) {
          this.touch.moved = true
        }
        const left=this.currentShow === 'cd'? 0 :-window.innerWidth
        const offsetwidth=Math.min(0,Math.max(-window.innerWidth,left+deltaX))
        this.touch.percent=Math.abs(offsetwidth/ window.innerWidth)
        this.$refs.lyricList.$el.style[transfrom]=`translate3d(${offsetwidth}px,0,0)`
        this.$refs.lyricList.$el.style[transitionDuration]=0
        this.$refs.middleL.style.opacity=1-this.touch.percent
        this.$refs.middleL.style[transitionDuration]=0
      },
      middleTouchEnd(){
        if (!this.touch.moved) {
          return
        }
          let offsetwidth
          let opacity
          if(this.currentShow==='cd'){
            if(this.touch.percent>0.1){
              offsetwidth=-window.innerWidth
              opacity=0
              this.currentShow='lyric'
            }else {
              offsetwidth=0
              opacity=1
            }
          }else {
            if(this.touch.percent<0.9){
              offsetwidth=0
              this.currentShow='cd'
              opacity=1
            }else{
              offsetwidth=-window.innerWidth
              opacity=0
            }
          }
          const time=300
        this.$refs.lyricList.$el.style[transfrom]=`translate3d(${offsetwidth}px,0,0)`
        this.$refs.lyricList.$el.style[transitionDuration]=`${time}ms`
        this.$refs.middleL.style.opacity=opacity
        this.$refs.middleL.style[transitionDuration]=`${time}ms`
        this.touch.initiated = false
      },
      _pad(num,n=2){
        let len=num.toString().length
        while (len<n){
          num='0'+num
          len++
        }
        return num
      },
      onProgressBarChange(percent){
        const currentTime=this.currentSong.duration*percent
        this.$refs.audio.currentTime=currentTime
        if(!this.playing){
          this.togglePlaying()
        }
        if(this.currentLyric){
          this.currentLyric.seek(currentTime*1000)
        }
      },
      changeMode(){
        const mode=(this.mode+1)%3
        this.setPlayMode(mode)
        let list=null
        if(mode===playMode.random){
           list=shuffle(this.sequenceList)
        }else {
          list=this.sequenceList
        }
        this.resetCurrentIndex(list)
        this.setPlaylist(list)
      },
      resetCurrentIndex(list){
        let index=list.findIndex((item)=>{
          return item.id===this.currentSong.id
        })
        this.resetCurrentIndex(index)
      },
      _getPosAndScale(){
        const targetWidth=40
        const paddingLeft=40
        const paddingBottom=30
        const paddingTop=80
        const width=window.innerWidth*0.8
        const scale=targetWidth/width
        const x=-(window.innerWidth/2-paddingLeft)
        const y=window.innerHeight-paddingTop-width/2-paddingBottom
        return{
          x,
          y,
          scale
        }
      },
      ...mapMutations({
        setFullScreen:'SET_FULL_SCREEN',
        setPlayingState:'SET_PLAYING_STATE',
        setCurrentIndex:'SET_CURRENT_INDEX',
        setPlayMode:'SET_PLAY_MODE',
        setPlaylist:'SET_PLAYLIST'
      })
    },
    watch:{
      currentSong(newSong,oldSong){
        if(newSong.id===oldSong.id){
          return
        }
        if(this.currentLyric){
          this.currentLyric.stop()
        }
        setTimeout(()=>{
          this.$refs.audio.play()
          this.getLyric()
        },1000)
      },
      playing(newPlaying){
        const audio=this.$refs.audio
        this.$nextTick(()=> {
          newPlaying ? audio.play() : audio.pause()
        })
      }
    },
    components:{
      ProgressBar,
      ProgressCircle,
      Scroll
    }
  }
</script>

<style scoped lang="stylus" rel="stylesheet/stylus">
  @import "~common/stylus/variable"
  @import "~common/stylus/mixin"

  .player
    .normal-player
      position: fixed
      left: 0
      right: 0
      top: 0
      bottom: 0
      z-index: 150
      background: $color-background
      .background
        position: absolute
        left: 0
        top: 0
        width: 100%
        height: 100%
        z-index: -1
        opacity: 0.6
        filter: blur(20px)
      .top
        position: relative
        margin-bottom: 25px
        .back
          position absolute
          top: 0
          left: 6px
          z-index: 50
          .icon-back
            display: block
            padding: 9px
            font-size: $font-size-large-x
            color: $color-theme
            transform: rotate(-90deg)
        .title
          width: 70%
          margin: 0 auto
          line-height: 40px
          text-align: center
          no-wrap()
          font-size: $font-size-large
          color: $color-text
        .subtitle
          line-height: 20px
          text-align: center
          font-size: $font-size-medium
          color: $color-text
      .middle
        position: fixed
        width: 100%
        top: 80px
        bottom: 170px
        white-space: nowrap
        font-size: 0
        .middle-l
          display: inline-block
          vertical-align: top
          position: relative
          width: 100%
          height: 0
          padding-top: 80%
          .cd-wrapper
            position: absolute
            left: 10%
            top: 0
            width: 80%
            height: 100%
            .cd
              width: 100%
              height: 100%
              box-sizing: border-box
              border: 10px solid rgba(255, 255, 255, 0.1)
              border-radius: 50%
              &.play
                animation: rotate 20s linear infinite
              &.pause
                animation-play-state: paused
              .image
                position: absolute
                left: 0
                top: 0
                width: 100%
                height: 100%
                border-radius: 50%

          .playing-lyric-wrapper
            width: 80%
            margin: 30px auto 0 auto
            overflow: hidden
            text-align: center
            .playing-lyric
              height: 20px
              line-height: 20px
              font-size: $font-size-medium
              color: $color-text-l
        .middle-r
          display: inline-block
          vertical-align: top
          width: 100%
          height: 100%
          overflow: hidden
          .lyric-wrapper
            width: 80%
            margin: 0 auto
            overflow: hidden
            text-align: center
            .text
              line-height: 32px
              color: $color-text-l
              font-size: $font-size-medium
              &.current
                color: $color-text
      .bottom
        position: absolute
        bottom: 50px
        width: 100%
        .dot-wrapper
          text-align: center
          font-size: 0
          .dot
            display: inline-block
            vertical-align: middle
            margin: 0 4px
            width: 8px
            height: 8px
            border-radius: 50%
            background: $color-text-l
            &.active
              width: 20px
              border-radius: 5px
              background: $color-text-ll
        .progress-wrapper
          display: flex
          align-items: center
          width: 80%
          margin: 0px auto
          padding: 10px 0
          .time
            color: $color-text
            font-size: $font-size-small
            flex: 0 0 30px
            line-height: 30px
            width: 30px
            &.time-l
              text-align: left
            &.time-r
              text-align: right
          .progress-bar-wrapper
            flex: 1
        .operators
          display: flex
          align-items: center
          .icon
            flex: 1
            color: $color-theme
            &.disable
              color: $color-theme-d
            i
              font-size: 30px
          .i-left
            text-align: right
          .i-center
            padding: 0 20px
            text-align: center
            i
              font-size: 40px
          .i-right
            text-align: left
          .icon-favorite
            color: $color-sub-theme
      &.normal-enter-active, &.normal-leave-active
        transition: all 0.4s
        .top, .bottom
          transition: all 0.4s cubic-bezier(0.86, 0.18, 0.82, 1.32)
      &.normal-enter, &.normal-leave-to
        opacity: 0
        .top
          transform: translate3d(0, -100px, 0)
        .bottom
          transform: translate3d(0, 100px, 0)
    .mini-player
      display: flex
      align-items: center
      position: fixed
      left: 0
      bottom: 0
      z-index: 180
      width: 100%
      height: 60px
      background: $color-highlight-background
      &.mini-enter-active, &.mini-leave-active
        transition: all 0.4s
      &.mini-enter, &.mini-leave-to
        opacity: 0
      .icon
        flex: 0 0 40px
        width: 40px
        padding: 0 10px 0 20px
        img
          border-radius: 50%
          &.play
            animation: rotate 10s linear infinite
          &.pause
            animation-play-state: paused
      .text
        display: flex
        flex-direction: column
        justify-content: center
        flex: 1
        line-height: 20px
        overflow: hidden
        .name
          margin-bottom: 2px
          no-wrap()
          font-size: $font-size-medium
          color: $color-text
        .desc
          no-wrap()
          font-size: $font-size-small
          color: $color-text-d
      .control
        flex: 0 0 30px
        width: 30px
        padding: 0 10px
        .icon-play-mini, .icon-pause-mini, .icon-playlist
          font-size: 30px
          color: $color-theme-d
        .icon-mini
          font-size: 32px
          position: absolute
          left: 0
          top: 0

  @keyframes rotate
    0%
      transform: rotate(0)
    100%
      transform: rotate(360deg)
</style>
